TY - JOUR
T1 - "T-odd effects" in unpolarized Drell-Yan scattering
AU - Gamberg, Leonard P.
AU - Goldstein, Gary R.
N1 - Funding Information:
We thank Daniel Boer, Karo Oganessyan and Jen-Chieh Peng for useful discussions. This work is supported in part by the US Department of Energy under contracts, DE-FG02-07ER41460 (LG), and DE-FG02-92ER40702 (GRG).
PY - 2007/7/12
Y1 - 2007/7/12
N2 - We consider the leading twist "T-odd" contributions as the dominant source of the cos 2 φ{symbol} azimuthal asymmetry in unpolarized p over(p, ̄) → μ- μ+ X di-lepton production in Drell-Yan scattering. This asymmetry contains information on the distribution of quark transverse spin in an unpolarized proton. In a parton-spectator framework we estimate these asymmetries at 50 GeV center of mass energy. This azimuthal asymmetry is interesting in light of proposed experiments at GSI, where an anti-proton beam is ideal for studying the transversity properties of quarks due to the dominance of valence quark effects.
AB - We consider the leading twist "T-odd" contributions as the dominant source of the cos 2 φ{symbol} azimuthal asymmetry in unpolarized p over(p, ̄) → μ- μ+ X di-lepton production in Drell-Yan scattering. This asymmetry contains information on the distribution of quark transverse spin in an unpolarized proton. In a parton-spectator framework we estimate these asymmetries at 50 GeV center of mass energy. This azimuthal asymmetry is interesting in light of proposed experiments at GSI, where an anti-proton beam is ideal for studying the transversity properties of quarks due to the dominance of valence quark effects.
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U2 - 10.1016/j.physletb.2007.05.043
DO - 10.1016/j.physletb.2007.05.043
M3 - Article
AN - SCOPUS:34250884525
VL - 650
SP - 362
EP - 368
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 5-6
ER -